Well, a reel that jams and doesn't allow you to strip line, or that doesn't permit line to spool back on properly during the retrieve will keep you from fishing, period. That's what we're talking about here. Sure any functional reel will do the job for small trout and smallies. But lots of reels are not functional. In my experience, Cabela's intro reels can keep you from fishing, period.
And a second point: beginners don't have a "casting style." They haven't learned to cast yet. How they learn to cast will be dictated by the rod rather than the other way around. I learned on a cane rod built by my uncle. When I switched to glass, it was different. Then when I switched to graphite, different still.
A beginner doesn't need to go demo a bunch of rods and hear some bullshit from a pedantic sporting-goods salesman. He needs a basic, 9-foot, five-weight, fast-action rod that will encourage good casting form.